1263277251260 has 24 divisors (see below), whose sum is σ = 2653051571520. Its totient is φ = 505278644544.

The previous prime is 1263277251253. The next prime is 1263277251287. The reversal of 1263277251260 is 621527723621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1693595 + ... + 2322674.

It is an arithmetic number, because the mean of its divisors is an integer number (110543815480).

Almost surely, 2^{1263277251260} is an apocalyptic number.

1263277251260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1263277251260 is an abundant number, since it is smaller than the sum of its proper divisors (1389774320260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1263277251260 is a wasteful number, since it uses less digits than its factorization.

1263277251260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4032005 (or 4032003 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 44.

The spelling of 1263277251260 in words is "one trillion, two hundred sixty-three billion, two hundred seventy-seven million, two hundred fifty-one thousand, two hundred sixty".